Hypothesis: If a material undergoes a chemical change, then it will not retain its original properties because a new substance is formed. To test the hypothesis above, you will observe the changes during the experiment. To do this, you will use these observations to compare the of the substances to the of the substances.

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

Find the mass, in grams, of 5.00*10^23 molecules of f2